Fastener



FIG. 1 is an isometric of a fastener, embodying my new design;

FIG. 2 is a plan view of the fastener of FIG. 1;

FIG. 3 is a front elevation of the fastener of FIG. 1;

FIG. 4 is an isometric of a modified form of the design shown in FIG. 1;

FIG. 5 is a plan view of the modified form of FIG. 4; and

FIG. 6 is a front elevation of the modified form of FIG. 4.

The shank is fragmentarily depicted to show indeterminate length.

The ornamental design for a fastener, substantially as shown anddescribed.